1, Installed on the frameless glass door 2, Dual-current ... The product use with access controller, to be installed on the frameless glass door. • Dual-current protection, Low ... fail-safe, and operates with DC12V, 3 working grades of time delaying. circuit for using. There are ... the lock, which guiding out for sensoring of the lock and the working status.Specification Voltage DC12V Red Postive (+) ...